Adding annotation closure constant to directions criteria. (#1251)

Co-authored-by: Seth Bourget <seth@cafesilencio.net>

Author: Seth Bourget

services-directions-models/src/main/java/com/mapbox/api/directions/v5/DirectionsCriteria.java

@@ -122,6 +122,11 @@ public final class DirectionsCriteria {
    */
   public static final String ANNOTATION_MAXSPEED = "maxspeed";
 
+  /**
+   * The closure of sections of a route.
+   */
+  public static final String ANNOTATION_CLOSURE = "closure";
+
   /**
    * Exclude all tolls along the returned directions route.
    *